Documented information in ISO

Answer:

A procedure is the specified way to carry out activities making up a process, while an instruction describes the sequence of steps to conduct the tasks making up an activity.
Regarding the documented information, the standard differences between documented information to be maintained, commonly known as procedures, and documented information to be retained, known as records.
I relation to the structure of the documentation, although it is not mandatory you can follow this documentation hierarcy represented in a pyramid: 1) manual, 2) policy, 3) procedures, 4)work instructions, 5) records.

These materials can help you to learn more about documented information :
- Article: How to structure quality management system documentation; https://advisera.com/ 001academy/knowledgebase/how-to-structure-quality-management-system-documentation/
- Article - New approach to document and record control i ISO 9001:2015: https://advisera.com/9001academy/blog/2015/06/30/new-approach-to-document-and-record-control-in-iso-90012015/
- Book - Managing ISO documentation: a plain English guide: https://advisera.com/books/managing-iso-documentation-plain-english-guide/